Visit C:\Users\$USERNAME\AppData\Local\Packages\ to figure out your installation code. Why is it done like this? Who knows! Maybe it's for the same reason Firefox does it: To make it (somehow) difficult for attacks to find that directory.

Unfortunately, due to the nature of WindowsApps, I cannot provide something that will work unmodified. Change SOMETHING to your appropriate code.

I used Process Lasso, then did
-- right-click > Locate > Locate executable on disk ...

context.reg

Windows Registry Editor Version 5.00[HKEY_CLASSES_ROOT\Directory\Background\shell\Debian]@="Debian &Shell"; This will likely be particular to the user."Icon"="C:\\Program Files\\WindowsApps\\TheDebianProject.DebianGNULinux_SOMETHING\\debian.exe"[HKEY_CLASSES_ROOT\Directory\Background\shell\Debian\Command]@="debian.exe run bash.exe -c zsh"[HKEY_CLASSES_ROOT\Directory\shell\Debian]@="Debian &Shell"; This will likely be particular to the user."Icon"="C:\\Program Files\\WindowsApps\\TheDebianProject.DebianGNULinux_SOMETHING\\debian.exe"[HKEY_CLASSES_ROOT\Directory\shell\Debian\Command]@="debian.exe run bash.exe -c zsh"